# Flex vs Supplement Tracker

The clearest difference is iOS requirement: Flex at 13.4 against Supplement Tracker's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Flex sells 2 in-app purchases, starting at $13.99 per month and Supplement Tracker sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Flex | Supplement Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Size | 70 MB | 12 MB |
| Requires iOS | **13.4** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [CAPNKLUTCH](https://appshunter.io/developer/1772032590) | [Rinalds Domanovs](https://appshunter.io/developer/1492041291) |

## What reviewers say

### Flex

[App page](https://appshunter.io/ios/app/flex-stretch/id6736611703)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $13.99 | per month |
| Premium Annual | $39.99 | per year |


### Supplement Tracker

[App page](https://appshunter.io/ios/app/supplement-tracker-smartstack/id6754736511)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Annual Subscription | $29.99 | per year |


## Frequently asked questions

### Is Flex free?

Flex is free to download, with in-app purchases available.

### Is Supplement Tracker free?

Supplement Tracker is free to download, with in-app purchases available.

### Do Flex or Supplement Tracker have ads?

Neither Flex nor Supplement Tracker shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*